Distance is over 2 miles, with 1,000mm telephoto lens on a solid BERLEBACH wooden tripod. It is an MF P-6 ARSAT Apo IF MC 5,6/500mm with an MF SCHNEIDER-Kreuznach 2x Doubler P-6 original for the EXACTA 66, adapted to my Canon 5DMkII with tripod and LiveView focusing. It needs a glass clear weather to do such images, which is rare, especially shooting directly over the Rhine River. I am using this combination also with my 6x6 WIESE-Pentasix 636, and my CONTAX 645 AF with roll film materials up to 2,000mm.